Old adage of construction, if you think "but how could this ever get wet?" you're fucked. Everything will get wet at some point, so everything has to be self dr

Old adage of construction, if you think "but how could this ever get wet?" you're fucked. Everything will get wet at some point, so everything has to be self drying. The plastic film stuff has been tested pretty well for current structures. But as the insulation thickness increases there might not be big enough pressure gradient across the structure. Concrete does not get a pass though. Here in Finland we have had bit thicker insulation for a while. Even if you don't get wood rotting, you can get mold. That ruins indoor air quality.